In all the world, Nonja (Nonja 
) is a rare largely female, but infrequently boy's first name. The forename Nonja is characteristic of South Africa, where it is a very rare principally girly, but scarcely male name, Tanzania, where it is a very rare female name, and India, where it is an extremely rare gender-neutral name. Much less frequently, Nonja is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Nonja | Netherlands, Tanzania, South Africa, United States, India |